EFFECT OF FOUR KINDS OF FERTILIZER ON NEMATODE ABUNDANCE IN TSURUOKA DRYLAND, JAPAN

Fadila Rahma Yunita, Dr. Ir. Daryono Prehaten, S.Hut., M.Sc., IPM. ; Associate Prof. Dr. Satoru Sato

2025 | Skripsi | KEHUTANAN

Lahan kering memiliki karakteristik rendahnya kandungan air dan bahan organik yang berdampak pada rendahnya produktivitas tanah. Salah satu pendekatan untuk meningkatkan kualitas tanah adalah melalui aplikasi pupuk, yang dapat memengaruhi dinamika komunitas mikroorganisme tanah, termasuk nematoda. Nematoda berperan penting sebagai bioindikator kesuburan tanah dan kesehatan mikroekosistem. Penelitian ini bertujuan untuk membandingkan kelimpahan nematoda setelah diberi lima perlakuan pupuk berbeda serta mengetahui perbedaan signifikan antar perlakuan tersebut.

Penelitian dilakukan di lahan kering milik Yamagata University, Tsuruoka, Jepang, menggunakan Rancangan Acak Lengkap (RAL) dengan lima perlakuan: kontrol (tanpa pupuk), pupuk kompos, pupuk BSF (Black Soldier Fly), pupuk kandang babi (swine), dan pupuk kimia NPK. Pengumpulan data dilakukan melalui pengambilan sampel tanah sebelum dan sesudah perlakuan, diikuti dengan proses ekstraksi nematoda menggunakan metode Baermann. Kelimpahan nematoda dihitung per 100 gram tanah, lalu dianalisis menggunakan uji ANOVA dan uji lanjut Tukey HSD melalui perangkat lunak R Studio.

Hasil penelitian menunjukkan bahwa pupuk BSF menghasilkan kelimpahan nematoda tertinggi, diikuti oleh swine, kompos, kontrol, dan NPK. Terdapat perbedaan yang signifikan antar perlakuan (p < 0>

Kata kunci: nematoda tanah, pupuk organik, BSF, aktivitas mikroba, indikator biologis

Drylands are characterised by low water and organic matter content, which results in low soil productivity. One approach to improving soil quality is through fertilizer application, which can affect the dynamics of soil microorganism communities, including nematodes. Nematodes play an

important role as bioindicators of soil fertility and microecosystem health. This study aimed to compare the abundance of nematodes after five different fertilizer treatments and determine the significant differences between the treatments.

The study was conducted on dryland of Yamagata University, Tsuruoka, Japan, using a completely randomized design (CRD) with five treatments: control (no fertilizer), compost, BSF (Black Soldier Fly) fertilizer, swine manure, and NPK chemical fertilizer. Data were collected through soil sampling before and after treatment, followed by nematode extraction using the Baermann method. Nematode abundance was calculated per 100 grams of soil, then analysed using ANOVA test and Tukey HSD follow-up test using R Studio software.

The results showed that BSF fertilizer produced the highest nematode abundance, followed by swine, compost, control and NPK. There were significant differences between treatments (p < 0>

Keywords: soil nematodes, organic fertilizer, BSF, microbial activity, biological indicators

Kata Kunci : soil nematodes, organic fertilizer, BSF, microbial activity, biological indicators